1. Laser-engineered Inconel 625 for enhanced oxygen evolution electrocatalysisAngelja Kjara Surca, Marjan Bele, Črtomir Donik, Irena Paulin, Martin Šala, Jakob Starec Oman, Miha Osredkar, Mejrema Nuhanović, Jan Ocepek, Matjaž Godec, Goran Dražić, Nejc Hodnik, Luka Suhadolnik, 2026, original scientific article Published in DiRROS: 02.02.2026; Views: 184; Downloads: 111
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2. Recognizing the universality of Copper reconstruction via dissolution–redeposition at the onset of ▫$Co[sub]2$▫ reductionBlaž Tomc, Marjan Bele, Matic Plut, Mitja Kostelec, Stefan Popović, Mohammed Azeezulla Nazrulla, Francisco Ruiz-Zepeda, Ana Rebeka Kamšek, Martin Šala, Adam Elbataioui, Lidija D. Rafailović, Yasmin Bastos Pissolitto, Francisco Trivinho-Strixino, Wojciech Jerzy Stępniowski, Luka Suhadolnik, Nejc Hodnik, 2025, original scientific article Published in DiRROS: 23.12.2025; Views: 302; Downloads: 176
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3. Operando impedance spectroscopy informed dynamic internal resistance compensation mitigates bubble-induced distortions of the applied potentialBlaž Tomc, Miha Hotko, Aleš Marsel, Nik Maselj, Maja Svete, Luka Suhadolnik, Marjan Bele, Pedro Farinazzo Bergamo Dias Martins, Dušan Strmčnik, Miran Gaberšček, Nejc Hodnik, 2025, original scientific article Published in DiRROS: 15.12.2025; Views: 366; Downloads: 164
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4. Insights into surface microstructural engineering of Inconel 625 for enhanced oxygen evolution reaction performanceLuka Suhadolnik, Črtomir Donik, Blaž Tomc, Mejrema Nuhanović, Martin Šala, Marjan Bele, Matjaž Finšgar, Andraž Mavrič, Iztok Arčon, Matjaž Godec, Nejc Hodnik, 2025, original scientific article Keywords: electrocatalysis, compositionally complex materials, commercial nickel alloys, oxygen evolution reaction, scanning electron microscopy, IL-SEM
Published in DiRROS: 29.10.2025; Views: 473; Downloads: 252
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5. Workflow and practical guidance for identical location scanning electron microscopy: reliable tracking of localized transformationsBlaž Tomc, Marjan Bele, Ana Rebeka Kamšek, Milena Martins, Aleš Marsel, Miha Hotko, Stefan Popović, Gregor Kapun, Črtomir Donik, Mitja Kostelec, Matjaž Godec, Nejc Hodnik, Luka Suhadolnik, 2025, original scientific article Abstract: Understanding material transformations at the nano- and microscale is essential for advancing electrocatalysis, energy storage, and other applications. Conventional SEM imaging, which captures random locations before and after treatment, struggles to distinguish real transformations from inherent sample heterogeneity. Identical Location SEM (IL-SEM) overcomes this by enabling re-imaging of the exact same region, offering clear evidence of localized changes in morphology, structure, and composition. Despite its simplicity and wide applicability, IL-SEM remains underutilized. This article presents a detailed, practical guide to implementing IL-SEM reliably, including sample alignment, multiscale imaging, and consistent re-localization. Key methodological tips and solutions to common challenges are provided, making the approach accessible even for non-expert users. To showcase its versatility, we present case studies involving electrocatalysts, alloys, and nanostructured materials. Moreover, by integrating IL-SEM with energy-dispersive spectroscopy (EDS) and electron backscatter diffraction (EBSD), we demonstrate how compositional and crystallographic evolution can be tracked alongside morphological changes. This optimized workflow offers a powerful, non-destructive method for visualizing dynamic material behavior and provides a foundation for IL-SEM to become a standard technique for studying structural evolution across diverse materials research fields.
Keywords: electrocatalysis, identical location electron microscopy, IL-SEM, materials characterization, scanning electron microscopy, surface analysis
Published in DiRROS: 15.10.2025; Views: 511; Downloads: 252
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6. Grain-resolved mapping of oxygen evolution activation on a Ni-superalloyČrtomir Donik, Luka Suhadolnik, Blaž Tomc, Anton Voronkin, Jon Ustarroz, Marjan Bele, Matjaž Godec, Nejc Hodnik, 2025, original scientific article Abstract: We report the first grain-resolved mapping of oxygen evolution reaction (OER) activation on a Ni-based superalloy using identicallocation EBSD, complemented by IL-SEM, IL-EDS, and SECCM. NiFe (oxy)hydroxide film formation and OER activity are strongly influenced by grain size and orientation, with (111)-oriented and smaller grains showing the highest activity. These findings reveal pronounced microstructure heterogeneity and establish IL-EBSD as a powerful tool for guiding the design of advanced electrocatalysts.
Keywords: Ni-superalloy, IL-SEM, IL-EDS, SECCM
Published in DiRROS: 10.10.2025; Views: 468; Downloads: 203
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7. Iridium stabilizes ceramic titanium oxynitride support for oxygen evolution reactionGorazd Koderman Podboršek, Luka Suhadolnik, Anja Logar, Marjan Bele, Armin Hrnjić, Živa Marinko, Janez Kovač, Anton Kokalj, Lea Gašparič, Angelja Kjara Surca, Ana Rebeka Kamšek, Goran Dražić, Miran Gaberšček, Nejc Hodnik, Primož Jovanovič, 2022, original scientific article Published in DiRROS: 07.05.2025; Views: 996; Downloads: 385
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8. Functionalization of FeCoNiCu medium entropy alloy via nitridation and anodic oxidation for enhanced oxygen evolution and glycerol oxidationLuka Suhadolnik, Milutin Smiljanić, Marjan Bele, Mejrema Nuhanović, Matjaž Finšgar, Nik Maselj, Daniela Neumüller, Lidija D. Rafailović, Nejc Hodnik, 2025, original scientific article Abstract: Medium entropy alloys (MEAs) have emerged as a promising class of materials for electro-catalysis due to their tunableproperties and exceptional catalytic performance. This study successfully functionalized a bulk FeCoNiCu alloy using a combined anodic oxidation (AO) and nitridation (NT) approach to produce a highly porous, thin-film catalyst. The hierarchical structure formed during the surface treatments enhances the material's specific surface area and alters the oxidation states of the constituent metals, creating abundant active sites. The electrocatalytic performance of themodified bulk FeCoNiCu electrode was evalu-ated for both the oxygen evolution reaction (OER) and glycerol oxidation reaction (GOR) in an alkaline electrolyte. Remarkably, the AO-NT-treated catalyst exhibited superior activity for OER, surpassing commercial IrOx benchmarks with lower overpotential requirements. For GOR, the FeCoNiCu electrode demonstrated excellent performance by significantly reducing energy input compared to OER, highlighting its potential as a dual-purpose catalyst for alkaline water splitting. Post-reaction product analysis via NMR confirmed the formation of value-added chemicals, with formic acid identified as the main product. These results underline the feasibility of surface-modified MEAs for sustainable energy and chemical production applications, offering a cost-effective alternative to noble metal-based catalysts.
Keywords: medium entropy alloy, surface modification, electrocatalysis, oxygen evolution reaction, glycerol oxidation
Published in DiRROS: 10.04.2025; Views: 852; Downloads: 420
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9. Electrochemically-grown chloride-free ▫$Cu_2O$▫ nanocubes favorably electroreduce ▫$CO_2$▫ to methane : the interplay of appropriate electrochemical protocolStefan Popović, Mohammed Azeezulla Nazrulla, Primož Šket, Kamal Khaja Mohaideen, Blaž Likozar, Luka Suhadolnik, Luka Pavko, Angelja Kjara Surca, Marjan Bele, Nejc Hodnik, 2023, original scientific article Published in DiRROS: 14.03.2023; Views: 3047; Downloads: 730
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